We have found one software suitable in our database for this conversion.
There exist several file types that share enc file extension and it is likely that at least some of them can be exported / converted to PDF format. For example music notations from Encore (.enc) may be possibly exported as PDF documents.
Also, some .enc files are known to be generated (encrypted and renamed) by some ransomware. In this case, you would need to first decrypt the file with some kind of decrypter and then you may convert the original content. Unfortunately, not every ransomware can be decrypted.
ENC
Files with enc extension can be most notably found as music notations from Encore, an easy-to use score-writing program for Windows and Mac. Notations are text formats that contain the phonographic data of certain song.
PDF
A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.